ATI LPN
ATI LPN Pharmacology Exam Questions
Extract:
Question 1 of 5
Calculate the following dosage using ratio and proportions method (Round answers to the nearest tenth). Order: Digoxin 0.375mg p. o. daily. Available: Digoxin (scored tablets) labeled 0.25mg
Correct Answer: B
Rationale: Tablets = 0.375 mg / 0.25 mg/tablet = 1.5 tablets.
Question 2 of 5
A nurse is preparing to administer dopamine 3mcg/kg/min by continuous IV infusion to a preschooler who weighs 41.8 bs. Available is dopamine 400 mg in dextrose 596 in water (D5W) 250 mL. The nurse should set the IV pump to deliver how many ml/hr? (Round to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: A
Rationale: Weight = 41.8 lb × 0.453592 = 18.96 kg. Dose = 3 mcg/kg/min × 18.96 kg × 60 = 3412.8 mcg/hr. Concentration = 400 mg / 250 mL = 1.6 mg/mL = 1600 mcg/mL. Flow rate = 3412.8 / 1600 = 2.13 mL/hr, rounded to 2.1 mL/hr.
Question 3 of 5
Calculate the dosage using the label below. Round to the nearest tenth place. Order: Bumex (bumetanide) 1 mg IV daily Available:
Correct Answer: C
Rationale: Concentration = 0.25 mg/mL. Volume = 1 mg / 0.25 mg/mL = 4 mL.
Question 4 of 5
Order: lidocaine 2 g in 250 mL of D5W at 30 mL/h What is the flow rate?
Correct Answer: B
Rationale: Flow rate is specified as 30 mL/hr in the order.
Question 5 of 5
A nurse is assisting in preparing an in-service program about preventing medication errors when transcribing a prescription. The nurse is using a dosage example of two tenths of a milligram. Which of the following transcription examples should the nurse use?
Correct Answer: A
Rationale: 0.2 mg uses a leading zero, avoiding errors per ISMP guidelines.